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Reactions with Water

Magnesium reacts only very slowly with cold water.The reactivity increases down the group.Hydrogen gas is released and the metal hydroxide is formed.The general equation for the reaction is: M (s) + 2 H2O (l) → M (OH)2 (aq) + H2 (g)

Group 2 Reaction with Water

Magnesium, Calcium and Barium with water: Mg (s) + 2 H2O (l) → Mg (OH)2 (s) + H2 (g)Ca (s) + 2 H2O (l) → Ca (OH)2 (s) + H2 (g)Ba (s) + 2 H2O (l) → Ba (OH)2 (aq) + H2 (g)

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Specification: Edexcel Chemistry (8CH0), AS-level, Topic 4A: The elements of Groups 1 and 2. Topic: Group 2.

More in Group 2

All 16 lessons in Group 2 · All Edexcel AS-level Chemistry topics